Answer: 4 ten-point questions and 15 four-point questions
Step-by-step explanation:
We will set up a system of equations to help us solve this question. Let x be ten-point questions and y be four-point questions.
A test has 19 questions;
x + y = 19
... worth a total 100 points;
10x + 4y = 100
Now, we will solve by graphing. See attached. The point of intersection is our solution, where the lines cross each other.
(4, 15), 4 ten-point questions and 15 four-point questions.
